find-last-index-x v3.1.2
find-last-index-x
Search an array from the end and return the matched index.
module.exports(array, callback, [thisArg])
⇒ number ⏏
Like findIndex
, this method returns an index in the array, if an element
in the array satisfies the provided testing function, except it is peformed
in reverse. Otherwise -1 is returned.
Kind: Exported function
Returns: number - Returns index of positively tested element, otherwise -1.
Throws:
- TypeError If array is
null
orundefined
- - TypeError If
callback
is not a function.
Param | Type | Description |
---|---|---|
array | Array | The array to search. |
callback | function | Function to execute on each value in the array, taking three arguments: element , index and array . |
thisArg | * | Object to use as this when executing callback . |
Example
import findLastIndex from 'find-index-x';
function isPrime(element, index, array) {
var start = 2;
while (start <= Math.sqrt(element)) {
if (element % start++ < 1) {
return false;
}
}
return element > 1;
}
console.log(findLastIndex([4, 6, 8, 12, 14], isPrime)); // -1, not found
console.log(findLastIndex([4, 6, 7, 12, 13], isPrime)); // 4
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
6 years ago
8 years ago
8 years ago
8 years ago
8 years ago
8 years ago
8 years ago
8 years ago
8 years ago
8 years ago
8 years ago
9 years ago
9 years ago
10 years ago
10 years ago
10 years ago
10 years ago
10 years ago
10 years ago
10 years ago
10 years ago
10 years ago
10 years ago
10 years ago
10 years ago